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    <a href="javascript:void()">点我什么也不会发生哦~<br /></a>
    <a href="javascript:void(alert('waring!!!'))">click!<br /></a>

    <a href="#pos">点我定位到指定位置!</a>
    <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br>
    <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br> <br><br><br> <br>
    <p id="pos">尾部定位点</p>

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